干旱区研究 ›› 2019, Vol. 36 ›› Issue (3): 691-697.

• 天气与气候 • 上一篇    下一篇

内蒙古荒漠草原降水有效性分析——基于苏尼特右旗过程降水量的监测

方婷婷1,闫勇智1,刘庆福1,朱羚1,韩芳2,张庆1   

  1. 1. 内蒙古大学生态与环境学院,内蒙古 呼和浩特 010021; 2. 内蒙古自治区生态与农业气象中心,内蒙古 呼和浩特 10051

  • 收稿日期:2018-08-20 修回日期:2018-12-07 出版日期:2019-05-15 发布日期:2019-05-15
  • 通讯作者: 韩芳
  • 作者简介:方婷婷(1994-),女,在读硕士研究生,主要研究方向为草地生态学.Email:849926970@qq.com
  • 基金资助:
    国家自然科学基金(31560180);内蒙古自治区科技计划项目(201601061);内蒙古自然科学基金(2016MS0320)及内蒙古自治区科技计划项目《基于多源卫星遥感的内蒙古干旱监测预警研究》资助

Precipitation Effectiveness in Desert Steppe in Inner Mongolia: Based on Monitoring of Storm Precipitation in Sonid Right Banner

FANG Ting-ting1, YAN Yong-zhi1, LIU Qing-fu1, ZHU Ling1, HAN Fang2, ZHANG Qing1   

  1. 1. College of Ecology and Environment,Inner Mongolia University,Hohhot 010021,Inner Mongolia,China; 2. Inner Mongolian Ecological and agrometeorological Center,Hohhot 010051,Inner Mongolia,China

  • Received:2018-08-20 Revised:2018-12-07 Online:2019-05-15 Published:2019-05-15

摘要: 研究选取内蒙古苏尼特右旗,通过分析20155月至201612月日降水数据和同期不同深度土壤(0~10 cm10~20 cm20~30 cm30~40 cm40~50 cm)含水量日连续观测数据,探讨降水事件对荒漠草原土壤含水量的影响。结果表明:① 降水量对表层土壤(0~10 cm10~20 cm)含水量影响最剧烈,且2层土壤含水量与降水量存在显著的正相关关系,其余3层土壤含水量对降水事件响应不显著。② 0~10 cm10~20 cm土壤层的最小有效降水量分别为6.4 mm8.33 mm。③ 结合最小有效降水量进一步推导0~10 cm10~20 cm土壤层的有效降水转化率发现,0~10 cm土壤最大有效降水转化率可达到95%,但是大部分都是在70%左右;10~20 cm最大有效降水转化率可达90%,但是大部分都是在50%左右。

关键词: 土壤含水量, 有效降水, 过程降水量, 苏尼特右旗, 内蒙古

Abstract: Climate change has become as one of the global issues in common concern. Water is one of the main limiting factors in semiarid grasslands. The change of precipitation pattern results in the change of soil moisture status. The effect of precipitation events on soil moisture content in desert steppe was studied based on the analysis of the daily precipitation data from May 2015 to December 2016 and the daily continuous observation data of soil moisture content at different depths (0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm and 40-50 cm). The results showed that:   The effect of precipitation on topsoil (0-10 cm and 10-20 cm) moisture content was the most significant, and there was a significant positive correlation between the soil moisture content of these two layers and precipitation. The response of soil moisture content of other three layers to precipitation events was not significant; The minimum volumes of effective precipitation to 0-10 cm and 10-20 cm soil layers were 6.4 mm and 8.33 mm respectively;   Inferred the minimum effective precipitation, it was found that the conversion rate of effective precipitation to soil moisture in 0-10 cm layer could be as high as 95%, but it was mostly about 70%; it could be as high as 90% in 10-20 cm soil layer, but it was mostly about 50%.

Key words: soil moisture content, effective precipitation, storm precipitation, Sonid Right Banner, Inner Mongolia